I decided to try to multipurpose my New Braunfels offset smoker. I figured if I took the cooking racks out of it I could put in a metal plate about 14x30 inches that would sit above the bottom grates and allow me to put 2 12 inch or 2 14 inch dutch ovens in it to cook. It would have 3 (almost 4) sided wind protection. The question is, I was thinking of using either thicker aluminum or diamond plate. I was told by the local hardware store that diamond plate and other steels can give of fumes that could be bad for me. They said wrought iron or aluminum or ceramic. Does anyone have any ideas about this?